Callaway WWTP
321 Main Ave PO Box 92, Callaway, MN 56521 · Becker County · Publicly Owned Treatment Works
- Average flow
- 0.13 MGD
- Design flow
- 0.56 MGD
- NPDES permit
- MN0022985
- Effective
- Permit expires
- January 2031
- Population served
- 178
- CWNS 2022
Callaway WWTP is a publicly owned wastewater treatment works in Callaway, Becker County, Minnesota treating an average of 0.13 million gallons per day against a permitted design capacity of 0.56 MGD, serving about 178 residents. It discharges under NPDES permit MN0022985 (effective), which expires in January 2031, with 0 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Callaway WWTP.
Available with a free Klarifi account
See the full treatment train at Callaway WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Callaway WWTP.
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Lake Park · 11 mi away
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Detroit Lakes · 12 mi away
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Waubun · 14 mi away
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Hitterdal · 17 mi away
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Ulen Township · 17 mi away
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Callaway WWTP: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed October 26, 2026; facility record last updated November 5, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Significant industrial user · WWTP · all terms